A fully automatic optical inspection system

Abstract

A fully automatic optical inspection system includes a machine body and a feeding device, a scanning device, an electric measuring device, a line-repairing device, a copper removal device, a vacuum plate, a control device, and a manipulator arranged on the machine body; the scanning device, the electric measuring device, the line-repairing device, and the copper removal device are arranged around the vacuum plate, the feeding device is arranged outside the electric measuring device, and the control device is used to drive the feeding device, the scanning device, the electric measuring device, the line-repairing device, the copper removal device, the vacuum plate, and the manipulator to cooperate with each other; the present invention integrates scanning detection, electric detection, and two maintenance stations into one to form a multi-station detection system, which greatly improves the automation degree and work efficiency of the equipment, reduces the labor intensity of the staff and the repair rate of the product. It is highly practical and has a strong promotion significance.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and in particular to a fully automatic optical detection system. Background Art

[0002] In the manufacturing process of circuit boards, after the circuit process is completed, the circuit boards need to be subjected to automatic optical inspection (AOI) to scan out defective points. After scanning, the defective circuit boards are sent to the inspection point for inspection and maintenance personnel to analyze and classify them. Repairable boards are repaired in time, and unrepairable boards are sent to MRB for scrapping by filling out a defective product notification form. All repairs and patching are fully inspected by a dedicated person using a ten-fold mirror; boards that pass the inspection and inspection enter the next process. The inspection results are manually recorded, and feedback is provided and corrective actions are taken for serious quality problems found during the inspection or process. However, the existing circuit board inspection process is mostly manually operated, which has the disadvantages of low work efficiency, high labor intensity, and judgment deviations due to the personal professional level of employees. Summary of the invention

[0003] Therefore, in view of the deficiencies in the prior art, an object of the present invention is to provide a fully automatic optical inspection system.

[0004] A fully automatic optical inspection system, comprising a machine body and a feeding device, a scanning device, an electric measuring device, a line-repairing device, a copper removal device, a vacuum plate, a control device, and a manipulator arranged on the machine body; the scanning device, the electric measuring device, the line-repairing device, and the copper removal device are arranged around the vacuum plate, the feeding device is arranged outside the electric measuring device, and the control device is used to drive the feeding device, the scanning device, the electric measuring device, the line-repairing device, the copper removal device, the vacuum plate, and the manipulator to cooperate with each other; A vacuum area corresponding to the scanning device, the electrical measuring device, the line-repairing device and the copper removal device is arranged on the top surface of the vacuum disk, and a plurality of vacuum holes are arranged on the vacuum area, a vacuum groove is formed in the vacuum hole, a drain pipe and a vacuum tube are arranged in the vacuum groove, the vacuum tube extends into the drain pipe, and the top end thereof extends out of the drain pipe; the top end of the vacuum tube is formed as an arc-shaped convex cover, an exhaust hole connected to the vacuum tube is arranged on the arc-shaped convex cover, an exhaust side hole is arranged on the vacuum tube between the arc-shaped convex cover and the top end of the drain pipe, and a water inlet hole is arranged on the side of the drain pipe; the electrical measuring device includes a plurality of electrical measuring needles, and the electrical measuring needles include a bottom shell and a main body installed in the bottom shell, a compression spring is arranged between the main body and the bottom shell, and the outer diameter of the main body is smaller than the inner diameter of the vacuum hole.

[0005] Furthermore, a conveying device is arranged outside the feeding device, one end of the conveying device extends outside the machine body, and the other end of the conveying device extends into the feeding device.

[0006] Furthermore, the loading device includes two lifting devices arranged at a relative interval, and the lifting device includes two rotating belts extending in the up-and-down directions, and a plurality of lifting plates installed on the rotating belts, and both ends of the lifting plates are installed on the two rotating belts.

[0007] Furthermore, the conveying device includes a conveyor belt, the inner end of the conveyor belt extends between the two lifting devices, and the width of the conveyor belt needs to be smaller than the distance between adjacent lifting plates of the two lifting devices.

[0008] Furthermore, a sensing device is provided on the vacuum area, and the sensing device senses the product and transmits a signal to the control device.

[0009] Furthermore, a good product conveyor belt and a waste product conveyor belt are also arranged on the outside of the vacuum disk. The good product conveyor belt and the waste product conveyor belt are respectively arranged on two opposite outer sides of the vacuum disk and extend outside the body.

[0010] Furthermore, the outer ends of the plurality of drain pipes are all connected to a main drain pipe, and a drain valve is provided on the main drain pipe.

[0011] Furthermore, the electrical measuring device is also provided with an adjustment device, which includes a guide rail and a rotating head mounted on the guide rail, the electrical measuring needle is mounted on the rotating head, the guide rail drives the electrical measuring needle to move horizontally and up and down, and the rotating head drives the electrical measuring needle to rotate.

[0012] Furthermore, the machine body includes a frame, a shell arranged on the frame, and guide wheels arranged at the bottom of the frame, and the guide wheels drive the entire machine body to move.

[0013] Furthermore, it also includes a data control module, which is connected to the control device.

[0014] In summary, the fully automatic optical inspection system of the present invention integrates scanning inspection, electrical inspection and two maintenance stations into one to form a multi-station inspection system, thereby improving the automation level and work efficiency of the equipment, reducing the labor intensity of staff and the repair rate of products. In addition, the equipment can be freely connected to multiple demand inspection processes on the production line, reducing manual transfer, reducing the risk of transfer scratches, and increasing the speed. In addition, the data control module can analyze and count data such as the product's yield rate, defective rate, and repair rate, and can issue an alarm in time, thereby reducing the probability of large-scale abnormalities; the present invention is highly practical and has a strong promotional significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of the fully automatic optical inspection system of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the internal structure of the detection system;

[0017] Figure 3 for Figure 2 Structural schematic diagram of the middle feeding device;

[0018] Figure 4 for Figure 2 A partial cross-sectional schematic diagram of a medium vacuum disk;

[0019] Figure 5 This is a schematic diagram of the structure of the electric probe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, the present invention provides a fully automatic optical inspection system, which is used to inspect semi-finished or finished circuit boards 100. The fully automatic optical inspection system includes a body 10 and a feeding device 20, a scanning device 30, an electric measuring device 40, a line-filling device 50, a copper removal device 60, a vacuum plate 70, a control device (not shown), and a manipulator (not shown) arranged on the body 10; the scanning device 30, the electric measuring device 40, the line-filling device 50, and the copper removal device 60 are arranged around the vacuum plate 70, the feeding device 20 is arranged on the outside of the electric measuring device 40, and the control device is used to drive the feeding device 20, the scanning device 30, the electric measuring device 40, the line-filling device 50, the copper removal device 60, the vacuum plate 70 and the manipulator to cooperate with each other.

[0022] A conveying device 80 is arranged outside the feeding device 20, and the conveying device 80 is connected to an external conveyor belt or an external material dropping device, or manual material discharge, etc. One end of the conveying device 80 extends outside the machine body 10, and the other end extends inside the feeding device 20. The feeding device 20 includes two lifting devices 21 arranged relatively spaced apart, and the lifting device 21 includes two rotating belts 22 extending in the up-down direction, and a plurality of lifting plates 23 mounted on the rotating belts 22, and the two ends of the lifting plates 23 are respectively mounted on the corresponding positions of the two rotating belts 22. The rotating belt 22 drives the lifting plates 23 to rotate, and the two rotating belts 22 rotate in opposite directions, so that the adjacent lifting plates 23 on the two lifting devices 21 rise at the same time, while the outer lifting plates 23 fall at the same time. The lifting plate 23 includes two side rods 231 and an extension rod 232 connecting the two side rods 231 or multiple parallel side rods 231, so that the surface contact between the product and the lifting plate 23 can be adjusted to line contact or point contact, reducing the contact surface between the plate and the product and reducing the risk of scratching the plate surface. The conveying device 80 includes a conveyor belt 81, the inner side end of the conveyor belt 81 extends between the two lifting devices 21, and the width of the conveyor belt 81 needs to be smaller than the spacing between the adjacent lifting plates 23 of the two lifting devices 21; so that the lifting plate 23 can smoothly lift the product upward from the conveyor belt 81.

[0023] The top surface of the vacuum plate 70 is provided with a plurality of vacuum areas 71, each of which is provided with a sensing device (not shown in the figure), and the scanning device 30 is provided directly above one of the vacuum areas 71. The robot takes out the plate loaded by the loading device 20 to the top and transfers it to the vacuum area 71 below the scanning device 30. The vacuum area 71 is evacuated to adsorb the product on the area. After the sensing device senses the product, it triggers the scanning device to scan the product. The outer side of the vacuum plate 70 is also provided with a good product conveyor belt 14 and a bad product conveyor belt 15. The good product conveyor belt 14 and the bad product conveyor belt 12 are respectively provided on the two opposite outer sides of the vacuum plate 70 and extend outside the machine body 10.

[0024] The vacuum area 71 is provided with a plurality of vacuum holes 72, and a vacuum groove 73 is formed in the vacuum hole 72. A drain pipe 74 and a vacuum pipe 75 are provided in the vacuum groove 73. The vacuum pipe 75 extends in the drain pipe 74, and its top end extends out of the drain pipe 74. The top end of the vacuum pipe 75 is formed as an arc-shaped convex cover 76, and an air extraction hole 77 connected to the vacuum pipe 75 is provided on the arc-shaped convex cover 76. An air extraction side hole 78 is provided on the vacuum pipe 75 between the arc-shaped convex cover 76 and the top end of the drain pipe 74, and a water inlet hole 79 is provided on the side of the drain pipe 74. The outer ends of the plurality of drain pipes 74 are all connected to a drain main pipe (not shown), and a drain valve is provided on the drain main pipe. When the water volume is stored to a certain amount and needs to be drained, the valve is opened to drain the water in the drain main pipe. The vacuum pipes 75 are all connected to a vacuum device, and the vacuum device vacuums and adsorbs the product through the vacuum pipe 75.

[0025] The electric measuring device 40 includes a plurality of electric measuring needles 41. The electric measuring needles 41 include a bottom shell 42 and a main body installed in the bottom shell 42. A compression spring is arranged between the main body and the bottom shell 42, so that the main body can be retracted into the bottom shell under external force. In addition, an adjustment device is also arranged on the electric measuring device 40. The adjustment device includes a guide rail and a rotating head installed on the guide rail. The electric measuring needles 41 are installed on the rotating head. The electric measuring needles 41 can move horizontally and up and down along the guide rail. The rotating head can drive the electric measuring needles to rotate. In this embodiment, the outer diameter of the main body needs to be smaller than the inner diameter of the vacuum hole 72. Therefore, when the vacuum hole 72 is blocked, the electric measuring needles 41 can move to the top of the vacuum hole 72 and move downward to conduct the vacuum hole 72. Since the electric measuring needles 41 are retractable, they will not collide with the vacuum tube 75 during the conduction process, thereby reducing wear.

[0026] The patching device 50 is used to patch the gap on the open circuit. If there is a defect such as short circuit, protruding copper, residual copper, etc. caused by excess copper on the product, copper removal is required. The copper removal device 60 is used to remove excess copper. The copper removal device 60 is provided with a scraper (dust suction pipe) and a dust suction pipe (not shown). The scraper can scrape off the protruding part of the protruding copper and the residual copper, or scrape off and then suck out the scraped copper with the dust suction pipe, or cut off the connecting line of the short-circuited part from both ends, and then suck out the excess copper wire.

[0027] In addition, the machine body 10 includes a frame 11, a shell 12 arranged on the frame 11, and a guide wheel 13 arranged at the bottom of the frame 11. The guide wheel 13 can drive the entire machine body 10 to move to any required position of the circuit board production line to inspect and repair semi-finished products or finished products in different processes. The fully automatic optical inspection system also includes a data control module, which is used to store product standard information and defect information, and can also generate a record sheet, analyze defect information in time, and issue a production alarm. In addition, the machine body 10 is also provided with an exhaust device (not shown) on the top, and the exhaust device is used to discharge the gas in the machine body 10 after filtering.

[0028] During operation, the products on the circuit board production line are transmitted upward from the feeding device 80 through the loading device 20, and the manipulator then transfers the topmost product to the vacuum area 71 below the electrical measuring device 40 in sequence. Since the lifting plates 23 are arranged at intervals, the probability of the board surface being scratched due to friction between the board surfaces can be reduced. The hollow structure on the lifting plate 23 is designed to improve heat dissipation and air permeability, and reduce the contact surface of the board surface. After the cleaning process, if the board surface or part of the board surface is not completely dry, this structure can avoid water accumulation on the lifting plate 23. In addition, the design of the detailed structure of the drain pipe 74 and the vacuum tube 75 in the vacuum hole 72 can absorb the moisture on the board surface through the vacuum hole 72 into the vacuum groove 73, and then flow into the drain pipe 74 through the vacuum groove 73. Thereby, the moisture on the board surface can be reduced, and the problem of excessive moisture affecting the adsorption force and water accumulation on the vacuum plate 70 can be avoided.

[0029] When the induction device on the vacuum area 71 below the electrical measuring device 40 senses the product, it transmits the information to the control device, which receives the information and drives the electrical measuring device 40 to perform electrical testing on the product. If the test result is a good product, the robot transfers the product to the scanning device 30 for appearance testing. If the appearance test shows that the product is good, the robot transfers the product to the good product conveyor belt 14 and transfers it to the next process. If the electrical test shows that the product is bad, a scanning test is still performed to check whether the abnormality is caused by visual reasons such as open circuit or short circuit.

[0030] The scanning device 30 uploads the detection information to the data control module, and the data control module compares and analyzes the detection data. If there is no appearance defect that affects the electrical performance after the scanning device 30 detects, but the electrical measurement is abnormal, it is an irreparable electrical defect, and the product is transferred to the scrap conveyor belt 15. If the scanning device 30 is normal and the scanning device 30 is defective, the scanning device 30 transmits data information to the data control module, and the control device drives the vacuum disk 70 to drive the product to rotate to the position corresponding to the abnormal cause for inspection and maintenance. For example, if the detected product is a repairable defect and needs to be repaired, the control device receives the information of the data control module and controls the vacuum disk 70 to rotate the product to the bottom of the repairing device 50. If copper removal is required, it is transferred to the bottom of the copper removal device 60. If there is a poor electrical measurement in the early stage, it needs to be transferred to the electrical measurement device 40 for inspection after repair. If it is normal, it will be transferred to the next process. If it is still abnormal, it will be transferred to the scrap conveyor belt 15. If there is no electrical defect in the early stage, it will be inspected again by the scanning device 30 after repair, and will enter the next process if it is qualified.

[0031] The data information of the board controlled by the data control module starts recording when the sensing device senses the board and ends when the board moves away from the sensing interruption. The information data of the entire board will generate a corresponding data sheet, and the defective information of multiple boards will be summarized and classified. If the overall defective rate or a certain type of defective rate exceeds the set value, the data control module will transmit a signal to the control device, and the control device will control an alarm device to sound an alarm; at the same time, its statistical data can be intuitively displayed on the display screen. In addition, for each batch of products produced, a summary table of the overall defective rate of the batch and the defective rate by category will be generated at the end. This reduces the tediousness and workload of manually recording registration forms.

[0032] In summary, the fully automatic optical inspection system of the present invention integrates scanning inspection, electrical inspection and two maintenance stations into one to form a multi-station inspection system, thereby improving the automation level and work efficiency of the equipment, reducing the labor intensity of staff and the repair rate of products. In addition, the equipment can be freely connected to multiple demand inspection processes on the production line, reducing manual transfer, reducing the risk of transfer scratches, and increasing the speed. In addition, the data control module can analyze and count data such as the product's yield rate, defective rate, and repair rate, and can issue an alarm in time, thereby reducing the probability of large-scale abnormalities; the present invention is highly practical and has a strong promotional significance.

[0033] The above-described embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it is not to be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A fully automatic optical inspection system, characterized in that: The invention comprises a machine body and a feeding device, a scanning device, an electric measuring device, a line-filling device, a copper-removing device, a vacuum plate, a control device and a manipulator arranged on the machine body; the scanning device, the electric measuring device, the line-filling device and the copper-removing device are arranged around the vacuum plate, the feeding device is arranged on the outside of the electric measuring device, and the control device is used to drive the feeding device, the scanning device, the electric measuring device, the line-filling device, the copper-removing device, the vacuum plate and the manipulator to cooperate with each other; a vacuum area corresponding to the scanning device, the electric measuring device, the line-filling device and the copper-removing device is arranged on the top surface of the vacuum plate, a plurality of vacuum holes are arranged on the vacuum area, a vacuum groove is formed in the vacuum hole, a drain pipe and a vacuum tube are arranged in the vacuum groove, the vacuum tube extends into the drain pipe, and the top end thereof extends out of the drain pipe; the top end of the vacuum tube is formed as an arc-shaped convex cover, the arc-shaped convex cover is provided with an exhaust hole connected to the vacuum tube, and an exhaust hole is arranged on the vacuum tube between the arc-shaped convex cover and the top end of the drain pipe A wind side hole, a water inlet hole is arranged on the side of the drain pipe; the electric measuring device comprises a plurality of electric measuring needles, the electric measuring needles comprise a bottom shell and a main body installed in the bottom shell, a compression spring is arranged between the main body and the bottom shell, the outer diameter of the main body is smaller than the inner diameter of the vacuum hole; an adjusting device is also arranged on the electric measuring device, the adjusting device comprises a guide rail and a rotating head installed on the guide rail, the electric measuring needles are installed on the rotating head, the guide rail drives the electric measuring needles to move horizontally and up and down, and the rotating head drives the electric measuring needles to rotate.

2. The fully automatic optical inspection system according to claim 1, characterized in that: A conveying device is arranged outside the feeding device, one end of the conveying device extends outside the machine body, and the other end of the conveying device extends into the feeding device.

3. The fully automatic optical inspection system according to claim 2, characterized in that: The loading device comprises two lifting devices arranged at a relative interval, and the lifting device comprises two rotating belts extending in the up-and-down directions and a plurality of lifting plates mounted on the rotating belts, and the two ends of the lifting plates are mounted on the two rotating belts.

4. The fully automatic optical inspection system according to claim 3, characterized in that: The conveying device comprises a conveying belt, the inner side end of which extends between the two lifting devices, and the width of the conveying belt needs to be smaller than the distance between adjacent lifting plates of the two lifting devices.

5. The fully automatic optical inspection system according to claim 1, characterized in that: The vacuum area is provided with a sensing device, which senses the product and transmits a signal to the control device.

6. The fully automatic optical inspection system according to claim 1, characterized in that: A good product conveyor belt and a waste product conveyor belt are also arranged outside the vacuum plate. The good product conveyor belt and the waste product conveyor belt are respectively arranged on two opposite outer sides of the vacuum plate and extend outside the machine body.

7. The fully automatic optical inspection system according to claim 1, characterized in that: The outer ends of the plurality of drainage pipes are all connected to a drainage main pipe, and the drainage main pipe is provided with a drainage valve.

8. The fully automatic optical inspection system according to claim 1, characterized in that: The machine body comprises a frame, a shell arranged on the frame, and guide wheels arranged at the bottom of the frame, and the guide wheels drive the entire machine body to move.

9. The fully automatic optical inspection system according to claim 1, characterized in that: It also includes a data control module, which is connected to the control device.

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